Kemfloor HF is a heavy-duty hardener that produces dense, hard surfaces on horizontal concrete in areas exposed to pedestrian and vehicular traffic. Kemfloor HF is a blended powder that is ready to use on-site. It consists of specially selected, hard-wearing aggregates with excellent abrasion and water resistance, combined with special additives and other chemicals that improve workability and make it easy to trowel into the surface of fresh, wet concrete.